A feeding trial was carried out to evaluate the growth performance
and fatty acid metabolism of juvenile grayling (T. thymallus,
L., Adriatic strain) in response to three diets supplying varying
levels and ratios of essential fatty acids (n-3 PUFAs, 7, 12, 8 g/kg;
n-6 PUFAs, 5, 10, 12 g/kg; n-3/n-6 ratios, 1.6, 1.2, 0.6). Each diet
was fed to visual satiety over 9 weeks to triplicate fish groups,
kept at 13.5±0.4°C, each consisting of 25 specimens (average
wgt. 12±0.3 g). Regardless of the dietary n-3 PUFA content, fish
growth and feed efficiency improved (P<0.05) by increasing
dietary n-6 PUFA level or decreasing n-3/n-6 ratio. Based on ind
